Electrical system of distribution.



G. CRUSBY.

ELECTRICAL SYSTEM QF msmulon.

APPLICATION VFILED FEB. 25. 1915.

' Patented Feb. 1.2, 1918.

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` UNITED STATES PATENT OFFICE.

-GDRHAM CROSBY, 0F GLEN RIDGE, NEW JERSEY, ASSIGNOR T0 GOULI) COUPLER COMPANY, A CORPORATION OF NEW YORK.

ELECTRICAL SYSTEM OF DISTRIBUTION.

Specification of Letterslatent.

Patented Feb. 12, 1918.

Application tiled February 25, 1916. Serial No. 80,361.

TaaZZ whom, zt ma? concern.'

Be it known t at I, GORHAM CROSBY, a citizen of the United States, residing at Glen Ridge, county of Essex, State of New Jersey, have invented certain new and useful Improvements in Electrical Systems of Distribution, of which the following is a speciication.

1 The invention relates to improvements in 1g electrical systems of distribution, and more illustrating a system embodying my improvelnents'in one form. .--gi 2 is a diagram-fof a similar system` showing certain modifications-and' Fig. 3 is a diagram of another system,- illustrating a further modilvReferring. to Fi'v 1,1 represents a generator connected to c large afistoragebattery 2, 30. and supply-av lamp or work circuit In ,seriesbetween 'the battery 2 and lamp cirffil-l cuit -3 is shown a";carbon pile regulator 4,

operated by :lleven-5,: controlled by a solenoid, connected across the lamp circuit so a5 as to maintain the voltage across the lamps substantially'constant, irrespectlve of variations of voltage-across thebattery.

.77 represents a shunt ield winding of the generator l. In series with the generator 40 shunt-field is placed a carbon pile 8, operated by a lever 9, controlled by a solenoid' if: having a voltage coil 10, connected across the -chargmgcircuit. In shunt with coil 10 is a-cax'bonfpileLll, operated by lever 12, con trollcd 'b'ya solenoidhaving a coil 30 connected in the:main;.generator circuit 4bei cV tween thefgenerator and battery. In series with the 'carbon'pil'e'll in the'shunt circuit around the coil 10 is a fixed resistance 14; and in series with both the coil 10 and the pile 1-1 is a fixed resistance 15. The soleioid operatingf the lever 9 is Valsoprovide" with a coil 16, connected between the genexiatorand battery in thebattery circuit, so asfto be resnonsiveto' batter;1 current-changes, the coil 1G being wound to oppose the coil 10. 19 represents an automatic Amain switch, adapted to connect the generator to the battery and lam s when the voltage of the generator reac ics the desired value, in a manner well understood by those skilled in the art.

In operation, when the battery is in a more or less charged condition, the strength of l coil 30 is insufficient to raise the lever 12, so that the carbon pile 11 is compressedto its 65A maximum, and the resistances of pile 1l and resistance 14 serve to act as a fixed resistance in parallel with the coil A10. Under these conditions the coil 10 acts to limitthe generator voltage wb enever it tends to vary with speed changes of the' generator or otherwise. If the voltage of the generator increases above the desired value, the strength of coil -10 increases, it 'being connected across the generator and battery, so that the lever 9 is operated to increase the resistance of pile 8, to weaken the generator field, and so acts to limit the generator' voltage. lVith. the generator voltage thus limited, when the battery becomes more or less substantiallycharged, the charging current will decrease, so that coil 16 becomes weaker. This decreasesthe opposing force of coil 16, so that coil 10 becomes effective to limit the generator. voltage to a lesser value. This action causes a rapid tapering o' of the charging'current, at the end of the battery charging period..

At the beginning of the b attery'charging p eriodkwith the battery in a more or less dischargedcondition, should the bat tery tend to take too great a current, coil 13v will act to raise the lever 12 and increase the resistance of pile 11, so that more current is shunted through the coil 10, making '95 it effective to operate pile 8, and lessen the generator voltage, so that the current in coil 30 ,is thus limited. When the coil 30f`is thus actin to operate=the pile 11, the generator-vo tage is regulated responsive to current .changes in the coil 30, since the 'changes in voltage .across the charging circuit, and impressed upon the circuit 'of coil 10 are insignificant as compared' with the changes produced by the current in coil 10,' by the action of.' the currentV controlled regulating element 1'1. At this time the current in coil 16 is for any given lamp load constant, being una'ected by speed changes. It thereforehas no 'eiieet upon the opera- 11) 1value.

The arrangement shown in Fig. 2 vis sub stantially the same, except that the coil' 16 and vresistances 14 and 15 are omitted, and the pile 1l is placedV in series- With the coil 10, a stop 18 being provided for the core of the solenoid 13 to limit the downward movement of the lever 12. Normally coil 10 operates the regulating elementA 8, to regulate the generator voltage responsive 'to voltage changes in the syst-em applied to--tlie doll l0,

without being affected by the action, oft4 the coil 13, which is too weak'tovrzuse it's .core and operate the pile 11.` If the battery be in a more or less. discharged condition, and tends to take too great 'a current, coil 13 will raise the lever l2 and compress the pile 11, so as to decrease the resistancein circuit with the coil 10, thus causing it to operate the Vpile 8 responsive to current changes in coil 13, to limit the current tothe desired;

Extra coil-17 is Wound on the'same- Asolenoid with the coil 13,'and is connected in series with the Vshunt field" Winding 7,3,so that at the higherspeeds of thet generator,

whenthe field current is greatly weakened l by theaction of regulating elementgizoil similar to that shown in F' cept ,that instead of op pile .element 8 with-usingle lever, -itis op- -erstedi-,by means o twoler'ersl-'and 22, one operhting upon .one end 'of the-'piloted the' .Otherjoperating upon the-other end of the tor' connnutatiomv manner, *the 7 is weakened and being Wound to.. oppose coil 13` acts to make coi 13 effective to operate the pile l1 with alle sser current therein, so that at the higher speeds, theniaximum current which maybe 'vered i'sconsiderably decreased, to liel'genera Referring to Fig. 3,-'tlie arrangement is pile. Theendsof the long arms 'of these levers are connected to a stem 23 of the'core .24 of the solenoid of coils 10 and 1.6, by means of a in and slot connection, sothat upon the raising of the core 24 by the soleno id, both levers 21 the resistance of the pile 8 at -both ends thereof simultaneously.. Also, in. a Vsimilar plunger of coil 6 ofthe lamp regulator is made to operate upon both ends of the carbon pile 4,-.by levers 25 and 2.l

It will be .obvious to those skilled 'in' the art that many other changes and modifications may be made Without departing from the spiritand scope of the inventinn,v Accordinglyl desire to cover allsysteuxs (which Spanne within the language of 'thenppended uns.

reducing and 22 act to increase4 Having described my invention what I claim as new and desire to secure by Letters Patent is:

.1. An' electrical system of distributionl having in combination a generator, a storage battery connected to. be charged thereby, a regulating element for-regulatin vthe generator voltage by var ing its fiel strength, a voltage coil norma ly operatingsuid element responsive to voltage variatwns of the system applied to said coil, whereby the generator 1s regulated responsive to voltage changes of the system ap lied to said coil, a current coil connected etween the generator and battery opposing the action of saidV voltage coil, a regulstln elementfor l'farying the strength off-sai volta e coil u said voltage coil and ajcurrent. coil 'connected between the generatorand battery and adapted the current-'therein exneeding a pre 'fterminedivalue to operate said .secondi-regule ting. elementto vary the current.insaid voltage coil so that the gen1- e'rator voltage regulated. responsive .to current eiiangesiils'tead of voltage changes oxliesystem.

.having incon'1 binetion, ejgenerutor, s.. storage battery. connected "to-.br charged.. thereby, a regultingelment--forieguluting the generator voltage, a. ,voltagel coil connected across tliechsrgin'g circuitf'and normally 'op'- eratingsfixdLelement 'directly responsive to voltage-,va 1ationsacross the charging cir .cuitgiwlliereby the generator is regulated re-= s'pznsive to voltagechanges directly bysaid /coil, azcoil in the batterycn'c'uit opposing said voltage coil, a variable resistance in shunt to said voltage coil and adapted u on. being operated to vary. the current in said voltage coil and il, current" coil connected between the generator and battery and adapted upon the current therein exceeding a redeter mined value to control saidv variabliefresistance to vary the current `in said voltage coil .3. An electrical systein of distributionf .having in. combina`ton, ege battery connected to acarbonpile in the generatorlield'g circuit for regulating thegeneratorvoltagc, uvoltf a generator, a. sterf be charge age coil connected across thefchargin vcir-' uit and normally operating said-,p e' dit normally substantially ineffective on 2. An ,electrical s-ism ofi-einbauen angesl acrossthe dlhercbn e rectly responsive to voltage variationsacross.

the charging circuit wherbyfthe generator 1s regulated, responsiveto .voltage chauves 'directly by seid coil, acurrent coiljn ebutteryv 'ing current to. the batteryas it .becomes charged, a carbon pile adapted upon being circuit cooperating with said volt-l gege coil to more rapidly cut down the .charg-` operated to vary the current in said voltage coil and a current coil connected between the generator and battery and adapted upon the current therein exceeding n predetermined value to control said second carbon pile to vary the current in said voltage coil so that the generator voltage is regulated resp0n- GORHAM CROSBY. 

